I agree with that list, apistia are also known as glass anemones and are basically pests. Their sting is very potent and they seem to spring out of nowhere, particularly if you overfeed or have slightly high nitrates. If you try to manually remove them any piece left in spreads, they can turn from annoying to a serious threat fairly fast. Some people have them an enjoy them though, I guess one man's trash is another man's treasure.
If you have sufficent lighting and a clown and feed regularly, you can keep a BTA or other anemones with some ease. Just read up on the different species. Clowns are not necessicary, but they seem to improve heath in an anemone by clearing it of wastes and feeding it occasionly.